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Switch Never Learn A Broadcast Address?: Mandar

Switches do not learn broadcast addresses because a broadcast address is never a source, only a destination. Broadcast addresses are used by switches to send traffic to all hosts when the destination MAC address is unknown, allowing the intended recipient to respond and identify itself.

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66 views1 page

Switch Never Learn A Broadcast Address?: Mandar

Switches do not learn broadcast addresses because a broadcast address is never a source, only a destination. Broadcast addresses are used by switches to send traffic to all hosts when the destination MAC address is unknown, allowing the intended recipient to respond and identify itself.

Uploaded by

vijay6996
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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switch never learn a broadcast address?

Mandar 2 posts since May 30, 2010


switch never learn a broadcast address? Feb 10, 2015 10:12 PM
Could someone please help me understand this.

Kev
Re: switch never learn a broadcast address? Feb 10, 2015 10:27 PM
switches learn source mac addresses...

a broadcast address is never a source, only a destination.

Avinash 15 posts since Jan 27, 2015


Re: switch never learn a broadcast address? Feb 10, 2015 10:50 PM
Switches learns the MAC addresses of its hosts to update MAC Database (CAM Table). MAC Addresses with
all the F's on are broadcast addresses which broadcast into 1 broadcast domain and will be learn by each host
in same broadcast domain. Broadcast addresses are used to find the destination host connected to switch
because switch don't have the MAC Address of destination host. e.g., Host A sends frame to Host B but switch
don't have MAC address of Host B so switch will broadcast to each host except Source port from where it
received the frame. Host B will reply that broadcast and all other hosts will discard that frame. I hope you are
cleared now that why & how switch broadcast?

2015 Cisco and/or its affiliates. All Rights Reserved. Generated on 2015-05-24-07:00
This document is Cisco Public Information.
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